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Diffstat (limited to 'arch/ia64/mm/contig.c')
| -rw-r--r-- | arch/ia64/mm/contig.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c deleted file mode 100644 index 1e9eaa107e..0000000000 --- a/arch/ia64/mm/contig.c +++ /dev/null @@ -1,208 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1998-2003 Hewlett-Packard Co - * David Mosberger-Tang <davidm@hpl.hp.com> - * Stephane Eranian <eranian@hpl.hp.com> - * Copyright (C) 2000, Rohit Seth <rohit.seth@intel.com> - * Copyright (C) 1999 VA Linux Systems - * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> - * Copyright (C) 2003 Silicon Graphics, Inc. All rights reserved. - * - * Routines used by ia64 machines with contiguous (or virtually contiguous) - * memory. - */ -#include <linux/efi.h> -#include <linux/memblock.h> -#include <linux/mm.h> -#include <linux/nmi.h> -#include <linux/swap.h> -#include <linux/sizes.h> - -#include <asm/efi.h> -#include <asm/meminit.h> -#include <asm/sections.h> -#include <asm/mca.h> - -/* physical address where the bootmem map is located */ -unsigned long bootmap_start; - -#ifdef CONFIG_SMP -static void *cpu_data; -/** - * per_cpu_init - setup per-cpu variables - * - * Allocate and setup per-cpu data areas. - */ -void *per_cpu_init(void) -{ - static bool first_time = true; - void *cpu0_data = __cpu0_per_cpu; - unsigned int cpu; - - if (!first_time) - goto skip; - first_time = false; - - /* - * get_free_pages() cannot be used before cpu_init() done. - * BSP allocates PERCPU_PAGE_SIZE bytes for all possible CPUs - * to avoid that AP calls get_zeroed_page(). - */ - for_each_possible_cpu(cpu) { - void *src = cpu == 0 ? cpu0_data : __phys_per_cpu_start; - - memcpy(cpu_data, src, __per_cpu_end - __per_cpu_start); - __per_cpu_offset[cpu] = (char *)cpu_data - __per_cpu_start; - per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; - - /* - * percpu area for cpu0 is moved from the __init area - * which is setup by head.S and used till this point. - * Update ar.k3. This move is ensures that percpu - * area for cpu0 is on the correct node and its - * virtual address isn't insanely far from other - * percpu areas which is important for congruent - * percpu allocator. - */ - if (cpu == 0) - ia64_set_kr(IA64_KR_PER_CPU_DATA, __pa(cpu_data) - - (unsigned long)__per_cpu_start); - - cpu_data += PERCPU_PAGE_SIZE; - } -skip: - return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; -} - -static inline __init void -alloc_per_cpu_data(void) -{ - size_t size = PERCPU_PAGE_SIZE * num_possible_cpus(); - - cpu_data = memblock_alloc_from(size, PERCPU_PAGE_SIZE, - __pa(MAX_DMA_ADDRESS)); - if (!cpu_data) - panic("%s: Failed to allocate %lu bytes align=%lx from=%lx\n", - __func__, size, PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); -} - -/** - * setup_per_cpu_areas - setup percpu areas - * - * Arch code has already allocated and initialized percpu areas. All - * this function has to do is to teach the determined layout to the - * dynamic percpu allocator, which happens to be more complex than - * creating whole new ones using helpers. - */ -void __init -setup_per_cpu_areas(void) -{ - struct pcpu_alloc_info *ai; - struct pcpu_group_info *gi; - unsigned int cpu; - ssize_t static_size, reserved_size, dyn_size; - - ai = pcpu_alloc_alloc_info(1, num_possible_cpus()); - if (!ai) - panic("failed to allocate pcpu_alloc_info"); - gi = &ai->groups[0]; - - /* units are assigned consecutively to possible cpus */ - for_each_possible_cpu(cpu) - gi->cpu_map[gi->nr_units++] = cpu; - - /* set parameters */ - static_size = __per_cpu_end - __per_cpu_start; - reserved_size = PERCPU_MODULE_RESERVE; - dyn_size = PERCPU_PAGE_SIZE - static_size - reserved_size; - if (dyn_size < 0) - panic("percpu area overflow static=%zd reserved=%zd\n", - static_size, reserved_size); - - ai->static_size = static_size; - ai->reserved_size = reserved_size; - ai->dyn_size = dyn_size; - ai->unit_size = PERCPU_PAGE_SIZE; - ai->atom_size = PAGE_SIZE; - ai->alloc_size = PERCPU_PAGE_SIZE; - - pcpu_setup_first_chunk(ai, __per_cpu_start + __per_cpu_offset[0]); - pcpu_free_alloc_info(ai); -} -#else -#define alloc_per_cpu_data() do { } while (0) -#endif /* CONFIG_SMP */ - -/** - * find_memory - setup memory map - * - * Walk the EFI memory map and find usable memory for the system, taking - * into account reserved areas. - */ -void __init -find_memory (void) -{ - reserve_memory(); - - /* first find highest page frame number */ - min_low_pfn = ~0UL; - max_low_pfn = 0; - efi_memmap_walk(find_max_min_low_pfn, NULL); - max_pfn = max_low_pfn; - - memblock_add_node(0, PFN_PHYS(max_low_pfn), 0, MEMBLOCK_NONE); - - find_initrd(); - - alloc_per_cpu_data(); -} - -static int __init find_largest_hole(u64 start, u64 end, void *arg) -{ - u64 *max_gap = arg; - - static u64 last_end = PAGE_OFFSET; - - /* NOTE: this algorithm assumes efi memmap table is ordered */ - - if (*max_gap < (start - last_end)) - *max_gap = start - last_end; - last_end = end; - return 0; -} - -static void __init verify_gap_absence(void) -{ - unsigned long max_gap; - - /* Forbid FLATMEM if hole is > than 1G */ - efi_memmap_walk(find_largest_hole, (u64 *)&max_gap); - if (max_gap >= SZ_1G) - panic("Cannot use FLATMEM with %ldMB hole\n" - "Please switch over to SPARSEMEM\n", - (max_gap >> 20)); -} - -/* - * Set up the page tables. - */ - -void __init -paging_init (void) -{ - unsigned long max_dma; - unsigned long max_zone_pfns[MAX_NR_ZONES]; - - memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); - max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT; - max_zone_pfns[ZONE_DMA32] = max_dma; - max_zone_pfns[ZONE_NORMAL] = max_low_pfn; - - verify_gap_absence(); - - free_area_init(max_zone_pfns); - zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page)); -} |